Comparison of Urine 4-(Methylnitrosamino)-1-(3)Pyridyl-1-Butanol and Cotinine for Assessment of Active and Passive Smoke Exposure in Urban Adolescents

Division of Clinical Pharmacology and Experimental Therapeutics, Medical Service, Departments of Medicine and Biopharmaceutical Sciences, University of California, San Francisco, California.Center for Tobacco Control Research and Education, University of California, San Francisco, California.

Center for Tobacco Control Research and Education, University of California, San Francisco, California.Division of Clinical Pharmacology, Department of Medicine, University of California, San Francisco, California.